Synthesis and magnetic properties of (Ba,Bi){sub 1.54}Rh{sub 8}O{sub 16} hollandite

Journal Article · Wed Sep 01 04:00:00 EDT 2004 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2004.05.012· OSTI ID:20879941

Klimczuk, T; Lee, W -L; Zandbergen, H W; Cava, R J

The synthesis, structure and electrical and magnetic properties of (Ba,Bi){sub 1.54}Rh{sub 8}O{sub 16} hollandite are discussed. The addition of Bi stabilizes the Ba-Rh hollandite, otherwise not found under our synthesis conditions. The compound crystallizes in the monoclinic space group I2/m, a = 9.425(5) A, b = 10.425(4) A, c = 3.160(1) A, {gamma} = 94.11(5). Electron diffraction and structure imaging show that the (Ba,Bi) columns along the tunnels are incommensurate with the Rh{sub 8}O{sub 16} framework, and analysis of the electron diffraction and elemental analysis allow the formula to be determined as Ba{sub 1.21}Bi{sub 0.33}Rh{sub 8}O{sub 16}. The compound shows Curie-Weiss paramagnetism, and we compare its susceptibility to that of Rh{sub 2}O{sub 3}. Polycrystalline samples show a negative d{rho}/dT between 0.3 and 300 K. No superconductivity is observed down to 0.3 K.

• OSTI ID: 20879941
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 39; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRON DIFFRACTION
HOLLANDITE
MAGNETIC PROPERTIES
MONOCLINIC LATTICES
PARAMAGNETISM
POLYCRYSTALS
RHODIUM OXIDES
SPACE GROUPS
SUPERCONDUCTIVITY
SYNTHESIS